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Physics, 18.03.2021 03:00 kaylallangari1509

CER AJUTOR IMEDIAT O placă dreptunghiulară cu lăţimea l = 1m şi lungimea L = 2m se încălzeşte cu 100ºC. Prin măsurare, un elev contată că lăţimea plăcii se măreşte cu 2mm (la încălzirea cu 100ºC).

Cu cât se dilată placa în lungime?

Calculati latimea si lungimea placii dilatate si aria acesteia.

Cu cât s-ar alungi o bară din acelaşi material având lungimea de 40m dacă s-ar încălzi cu 25ºC?

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CER AJUTOR IMEDIAT O placă dreptunghiulară cu lăţimea l = 1m şi lungimea L = 2m se încălzeşte cu 10...

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